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【简答题】
甲、乙、丙合伙经营一商店。甲被推选为负责人。在经营期间，甲放弃了商店对丁享有的5万元债权，甲的放弃债权行为（ ）。
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举一反三
【单选题】When a p-n junction is reverse-biased, its junction resistance is ( ).
A.
high
B.
low
C.
determined by the components that are external to the device
D.
constantly changing
【多选题】针对掌握德语语法的策略,下列表述正确的有哪些?
A.
多在动词上下功夫，熟练掌握动词变位；
B.
以句子为单位学习动词；
C.
牢记名词的词性和复数形式；
D.
掌握语法规则的同时，更应了解德国人的思维方式和文化习俗。
【单选题】关于导尿管留置术,下列叙述错误的是
A.
避免引流管受压、扭曲、堵塞
B.
每日消毒尿道口1--2次
C.
鼓励病人多饮水
D.
每日更换集尿袋和导尿管
E.
尿液浑浊、沉淀时做膀胱冲洗
【单选题】when we apply reverse bias to a P-N junction at less than the avalanche voltage, the junction
A.
does not conduct
B.
conducts intermittently
C.
conducts fairly well
D.
conducts very well
【单选题】When a p-n junction is reverse-biased, the depletion layer is ________ and the device acts as a near-perfect ________( ).
A.
narrowed; conductor
B.
narrowed; insulator
C.
widened; conductor
D.
widened; insulator
【单选题】Light-emitting diodes emit light when the p-n junction is ( ).
A.
forward-biased
B.
reverse-biased
C.
zero biased
D.
operating in the Zener region
【单选题】When we forward-bias a P-N junction ,it fails to conduct
A.
unless the junction has enough capacitance
B.
if the applied voltage is less than the forward breakover voltage
C.
if the applied voltage exceeds the avalanch voltage
D.
unless the voltage remains constant
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